31779780852 has 48 divisors (see below), whose sum is σ = 76247142272. Its totient is φ = 10294750080.

The previous prime is 31779780839. The next prime is 31779780883. The reversal of 31779780852 is 25808797713.

It is a super-2 number, since 2×31779780852² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31779780792 and 31779780801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336777 + ... + 420687.

Almost surely, 2^31779780852 is an apocalyptic number.

It is an amenable number.

31779780852 is an abundant number, since it is smaller than the sum of its proper divisors (44467361420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31779780852 is a wasteful number, since it uses less digits than its factorization.

31779780852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84808 (or 84806 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 57.

The spelling of 31779780852 in words is "thirty-one billion, seven hundred seventy-nine million, seven hundred eighty thousand, eight hundred fifty-two".